At 11.37 hours on 20 Feb 1944, HMS Warwick (D 25) (Cdr D.A. Rayner, DSC, RNVR) was hit aft by one of two torpedoes from U-413 about 15 miles from Trevose Head, Cornwall. The stern broke off abaft of the engine room and the ship stayed afloat for about 4 minutes until the bulkhead collapsed and caused her to sink. Three officers and 64 ratings were killed. The destroyer had been on submarine hunt together with HMS Saladin (H 54) (T/A/LtCdr P.G.C. King, RNVR) and HMS Scimitar (H 21) (Lt P. Archer-Shee, RNVR) in the Bristol Channel.